Semantics
bosom
Вязаная кофта туго обтягивала её бюст.
A knitted jacket fit her bosom snugly.
bust
Свитер туго обтягивал её высокий бюст.
The sweater fit her high bust snugly.
This entry is concerned with the use of the word бюст to refer to a woman's bosom. For the difference between the word бюст and its synonym грудь
2
see
Synonyms
under
Lexical Relationships,
below.